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https://github.com/golang/go
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c007ce824d
Preparation was in CL 134570043. This CL contains only the effect of 'hg mv src/pkg/* src'. For more about the move, see golang.org/s/go14nopkg.
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include <pthread.h>
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#include <signal.h>
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#include <stdio.h>
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#include <sys/limits.h>
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#include "libcgo.h"
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#define magic1 (0x23581321U)
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// PTHREAD_KEYS_MAX has been added to sys/limits.h at head in bionic:
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// https://android.googlesource.com/platform/bionic/+/master/libc/include/sys/limits.h
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// TODO(crawshaw): remove this definition when a new NDK is released.
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#define PTHREAD_KEYS_MAX 128
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// inittls allocates a thread-local storage slot for g.
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//
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// It finds the first available slot using pthread_key_create and uses
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// it as the offset value for runtime.tlsg.
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static void
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inittls(void **tlsg, void **tlsbase)
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{
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pthread_key_t k;
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int i, err;
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err = pthread_key_create(&k, nil);
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if(err != 0) {
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fatalf("pthread_key_create failed: %d", err);
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}
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pthread_setspecific(k, (void*)magic1);
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for (i=0; i<PTHREAD_KEYS_MAX; i++) {
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if (*(tlsbase+i) == (void*)magic1) {
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*tlsg = (void*)(i*sizeof(void *));
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pthread_setspecific(k, 0);
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return;
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}
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}
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fatalf("could not find pthread key");
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}
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void (*x_cgo_inittls)(void **tlsg, void **tlsbase) = inittls;
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